Foundation drain



FIG. 1 is an end elevational view of a foundation drain showing my new design;

FIG. 2 is a top plan view thereof; the foundation drain is broken in the center to show indeterminate length;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is an opposite end elevational view thereof;

FIG. 5 is a bottom plan view thereof; and,

FIG. 6 is a left side elevational view thereof. 

The ornamental design for foundation drain, as shown and described. 